<template>
    <div class="login_container">
        <div class="login_box">
            <!-- 头像区域 -->
            <div class="avatar_box">
                <img src="../assets/logo.png" alt="">
            </div>
            <!-- 登录表单区 -->
            <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
                <!-- 用户名 -->
                <el-form-item prop="username">
                    <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
                </el-form-item>
                <!-- 密码 -->
                <el-form-item prop="password">
                    <el-input v-model="loginForm.password" prefix-icon="iconfont icon-3702mima" type="password"></el-input>
                </el-form-item>
                <!-- 按钮区 -->
                <el-form-item class="btns">
                     <el-button type="primary" @click="login">登录</el-button>
                     <el-button type="info" @click="resetLoginForm">重置</el-button>
                </el-form-item>
            </el-form>
        </div>
    </div>
</template>

<script>
    export default {
        data(){
            return{
                // 这是登录表单的数据绑定对象
                loginForm: {
                    username: 'admin',
                    password: '123456'
                },
                 //这是表单验证规则对象
                loginFormRules:{
                    //验证用户名是否合法
                    username: [
                        { required: true, message: '请输入登录名称', trigger: 'blur' },
                         { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
                    ],
                    //验证密码
                    password: [
                        { required: true, message: '请输入登录密码', trigger: 'blur' },
                         { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
                    ]
                 }
            }
           
        },
        methods: {
            //点击重置按钮,,重置登录表单
            resetLoginForm() {
                //console.log(this)
                this.$refs.loginFormRef.resetFields();
            },
            login() {
                this.$refs.loginFormRef.validate( async valid => {
                  if(!valid) return;
                  const {data: res} = await this.$http.post("login",this.loginForm);
                  if(res.meta.status !== 200) return this.$message.error('登录失败')
                  this.$message.success('登录成功')
                //   1.将恩如成功之后的token，保存到客户端的sessionStorage中
                //     1.1项目中出了登录之外的API接口，必须再登录之后才能访问
                //     1.2token只应在当前网站打开期间生效，所以将token保存在sessionStorage中
                // console.log(res)
                window.sessionStorage.setItem('token', res.data.token)
                    // 2.通过编程式导航跳转到后台主页，路由地址是/home
                this.$router.push('/home')
                });
            }
        }
    };
</script>

<style lang="less" scoped>
 .login_container{
     background-color: #2b4b6b;
     height: 100%;
 }
 .login_box{
     width: 450px;
     height: 300px;
     background-color: white;
     border-radius: 3px;
     position: absolute;
     left: 50%;
     top: 50%;
     transform: translate(-50%,-50%);
 }
 .avatar_box{
     height: 130px;
     width: 130px;
     border: 1px solid #eee;
     border-radius: 50%;
     padding: 10px;
     box-shadow:  0 0 10px #ddd;
     position: absolute;
     left: 50%;
     transform: translate(-50%,-50%);
     background-color: #fff;
     img{
         width: 100%;
         height: 100%;
         border-radius: 50%;
         background-color: #eee;
     }
 }
 .btns{
     display: flex;
     justify-content: flex-end;
 }
 .login_form{
     position: absolute;
     bottom: 0;
     width: 100%;
     padding: 0 20px;
     box-sizing: border-box;
 }
</style>